Which statement concerning Inmarsat-FBB and Inmarsat-C terminals is correct?

Both Inmarsat-FBB and Inmarsat-C units are subject to shadowing effects due to their omni-directional antennas.

Both Inmarsat-FBB and Inmarsat-C units are subject to shadowing effects, but Inmarsat-FBB units have directional antennas.

Both Inmarsat-FBB and Inmarsat-C units are subject to shadowing effects, but Inmarsat-C units have directional antennas.

Both Inmarsat-FBB and Inmarsat-C units are subject to shadowing effects, due to their directional antennas.

Which statement concerning Inmarsat-FBB and...